If your box has no visible buttons, the reset switch is likely at the bottom of the 3.5mm AV jack.
when you see the "Upgrading" or "Hisilicon" logo on your TV. hi3798 firmware
the USB drive into the USB 2.0 port (sometimes the 3.0 port doesn't trigger the bootloader). If your box has no visible buttons, the
Custom firmware can remove background processes that slow down the CPU. Custom firmware can remove background processes that slow
If you tell me the and model , I can help you find: The specific download link for that device. The remote control configuration (so your buttons work).
the "Reset" button (usually hidden inside the AV port). Plug in the power while still holding the Reset button.
Even if the CPU matches, different boxes use different Wi-Fi chips (e.g., RTL8189 vs. AP6212). Using the wrong firmware might result in a working box with no wireless internet.